Manage ODU4 services over multiple OTU4
[transportpce.git] / pce / src / main / java / org / opendaylight / transportpce / pce / networkanalyzer / PceOtnNode.java
index ec1043fc123a27887a32f41bd14d97381f53fe30..3dc362796a5560d58c12093b694d8974119730a2 100644 (file)
@@ -8,7 +8,9 @@
 
 package org.opendaylight.transportpce.pce.networkanalyzer;
 
+import java.math.BigDecimal;
 import java.util.ArrayList;
+import java.util.BitSet;
 import java.util.Comparator;
 import java.util.HashMap;
 import java.util.List;
@@ -16,19 +18,24 @@ import java.util.Map;
 import java.util.TreeMap;
 import java.util.stream.Collectors;
 import org.eclipse.jdt.annotation.Nullable;
-import org.opendaylight.yang.gen.v1.http.org.openroadm.network.topology.types.rev181130.xpdr.odu.switching.pools.OduSwitchingPools;
-import org.opendaylight.yang.gen.v1.http.org.openroadm.network.topology.types.rev181130.xpdr.odu.switching.pools.odu.switching.pools.NonBlockingList;
-import org.opendaylight.yang.gen.v1.http.org.openroadm.network.types.rev181130.OpenroadmNodeType;
-import org.opendaylight.yang.gen.v1.http.org.openroadm.network.types.rev181130.OpenroadmTpType;
-import org.opendaylight.yang.gen.v1.http.org.openroadm.network.types.rev181130.xpdr.tp.supported.interfaces.SupportedInterfaceCapability;
-import org.opendaylight.yang.gen.v1.http.org.openroadm.otn.common.types.rev181130.ODTU4TsAllocated;
-import org.opendaylight.yang.gen.v1.http.org.openroadm.otn.network.topology.rev181130.Node1;
-import org.opendaylight.yang.gen.v1.http.org.openroadm.otn.network.topology.rev181130.TerminationPoint1;
-import org.opendaylight.yang.gen.v1.http.org.openroadm.otn.network.topology.rev181130.networks.network.node.SwitchingPools;
-import org.opendaylight.yang.gen.v1.http.org.openroadm.port.types.rev181130.If100GEODU4;
-import org.opendaylight.yang.gen.v1.http.org.openroadm.port.types.rev181130.If10GEODU2e;
-import org.opendaylight.yang.gen.v1.http.org.openroadm.port.types.rev181130.If1GEODU0;
-import org.opendaylight.yang.gen.v1.http.org.openroadm.port.types.rev181130.IfOCHOTU4ODU4;
+import org.opendaylight.transportpce.common.StringConstants;
+import org.opendaylight.yang.gen.v1.http.org.openroadm.common.state.types.rev191129.State;
+import org.opendaylight.yang.gen.v1.http.org.openroadm.equipment.states.types.rev191129.AdminStates;
+import org.opendaylight.yang.gen.v1.http.org.openroadm.network.topology.types.rev200327.xpdr.odu.switching.pools.OduSwitchingPools;
+import org.opendaylight.yang.gen.v1.http.org.openroadm.network.topology.types.rev200327.xpdr.odu.switching.pools.odu.switching.pools.NonBlockingList;
+import org.opendaylight.yang.gen.v1.http.org.openroadm.network.types.rev200529.OpenroadmNodeType;
+import org.opendaylight.yang.gen.v1.http.org.openroadm.network.types.rev200529.OpenroadmTpType;
+import org.opendaylight.yang.gen.v1.http.org.openroadm.network.types.rev200529.xpdr.tp.supported.interfaces.SupportedInterfaceCapability;
+import org.opendaylight.yang.gen.v1.http.org.openroadm.otn.common.types.rev200327.ODTU4TsAllocated;
+import org.opendaylight.yang.gen.v1.http.org.openroadm.otn.common.types.rev200327.ODTUCnTs;
+import org.opendaylight.yang.gen.v1.http.org.openroadm.otn.network.topology.rev200529.Node1;
+import org.opendaylight.yang.gen.v1.http.org.openroadm.otn.network.topology.rev200529.TerminationPoint1;
+import org.opendaylight.yang.gen.v1.http.org.openroadm.otn.network.topology.rev200529.networks.network.node.SwitchingPools;
+import org.opendaylight.yang.gen.v1.http.org.openroadm.port.types.rev200327.If100GEODU4;
+import org.opendaylight.yang.gen.v1.http.org.openroadm.port.types.rev200327.If10GEODU2e;
+import org.opendaylight.yang.gen.v1.http.org.openroadm.port.types.rev200327.If1GEODU0;
+import org.opendaylight.yang.gen.v1.http.org.openroadm.port.types.rev200327.IfOCHOTU4ODU4;
+import org.opendaylight.yang.gen.v1.http.org.openroadm.port.types.rev200327.IfOtsiOtsigroup;
 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.network.rev180226.NodeId;
 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.network.rev180226.networks.network.Node;
 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.network.topology.rev180226.TpId;
@@ -53,6 +60,9 @@ public class PceOtnNode implements PceNode {
     private final String pceNodeType;
     private final String otnServiceType;
     private String modeType;
+    // TODO: not adding state check in this class as otn topology has not been modified
+    private final AdminStates adminStates;
+    private final State state;
 
     private Map<String, List<Uint16>> tpAvailableTribPort = new TreeMap<>();
     private Map<String, List<Uint16>> tpAvailableTribSlot = new TreeMap<>();
@@ -80,6 +90,10 @@ public class PceOtnNode implements PceNode {
         this.usedXpdrClientTps.clear();
         this.availableXpdrClientTps = new ArrayList<>();
         this.usableXpdrClientTps = new ArrayList<>();
+        this.adminStates = node.augmentation(org.opendaylight.yang.gen.v1.http.org.openroadm.common.network.rev200529
+                .Node1.class).getAdministrativeState();
+        this.state = node.augmentation(org.opendaylight.yang.gen.v1.http.org.openroadm.common.network.rev200529
+                .Node1.class).getOperationalState();
         this.tpAvailableTribPort.clear();
         checkAvailableTribPort();
         this.tpAvailableTribSlot.clear();
@@ -110,50 +124,63 @@ public class PceOtnNode implements PceNode {
 
         for (org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.network.topology.rev180226.networks.network
                 .node.TerminationPoint tp : allTps) {
-            org.opendaylight.yang.gen.v1.http.org.openroadm.common.network.rev181130.@Nullable TerminationPoint1 ocnTp1
-                = tp.augmentation(org.opendaylight.yang.gen.v1.http.org.openroadm.common.network.rev181130
+            org.opendaylight.yang.gen.v1.http.org.openroadm.common.network.rev200529.@Nullable TerminationPoint1 ocnTp1
+                = tp.augmentation(org.opendaylight.yang.gen.v1.http.org.openroadm.common.network.rev200529
                 .TerminationPoint1.class);
             //TODO many nested if-structures below, this needs to be reworked
-            if (OpenroadmTpType.XPONDERNETWORK.equals(ocnTp1.getTpType()) && this.otnServiceType.equals("ODU4")) {
+            if (OpenroadmTpType.XPONDERNETWORK.equals(ocnTp1.getTpType())) {
                 TerminationPoint1 ontTp1;
                 if (tp.augmentation(TerminationPoint1.class) != null) {
                     ontTp1 = tp.augmentation(TerminationPoint1.class);
                 } else {
                     continue;
                 }
-                if (checkTpForOdtuTermination(ontTp1)) {
-                    LOG.info("TP {} of XPONDER {} is validated", tp.getTpId(), node.getNodeId().getValue());
-                    this.availableXpdrNWTps.add(tp.getTpId());
-                } else {
-                    LOG.error("TP {} of {} does not allow ODU4 termination creation", tp.getTpId().getValue(),
-                        node.getNodeId().getValue());
-                }
-            } else if (OpenroadmTpType.XPONDERNETWORK.equals(ocnTp1.getTpType())
-                && (this.otnServiceType.equals("10GE") || this.otnServiceType.equals("1GE"))) {
-                TerminationPoint1 ontTp1;
-                if (tp.augmentation(TerminationPoint1.class) != null) {
-                    ontTp1 = tp.augmentation(TerminationPoint1.class);
-                } else {
-                    continue;
-                }
-                if ("10GE".equals(otnServiceType) && checkOdtuTTPforLoOduCreation(ontTp1, 10)
-                    || "1GE".equals(otnServiceType) && checkOdtuTTPforLoOduCreation(ontTp1, 1)) {
-                    LOG.info("TP {} of XPONDER {} is validated", tp.getTpId(), node.getNodeId().getValue());
-                    this.availableXpdrNWTps.add(tp.getTpId());
-                } else {
-                    if ("10GE".equals(otnServiceType)) {
-                        LOG.error("TP {} of {} does not allow OD2e termination creation", tp.getTpId().getValue(),
-                            node.getNodeId().getValue());
-                    } else if ("1GE".equals(otnServiceType)) {
-                        LOG.error("TP {} of {} does not allow ODU0 termination creation", tp.getTpId().getValue(),
-                            node.getNodeId().getValue());
-                    } else {
-                        LOG.error("TP {} of {} does not allow any termination creation", tp.getTpId().getValue(),
-                            node.getNodeId().getValue());
-                    }
+                switch (this.otnServiceType) {
+                    case StringConstants.SERVICE_TYPE_100GE_S:
+                        // TODO verify the capability of network port to support ODU4 CTP interface creation
+                    case StringConstants.SERVICE_TYPE_ODU4:
+                    case StringConstants.SERVICE_TYPE_ODUC4:
+                        if (!checkTpForOdtuTermination(ontTp1)) {
+                            LOG.error("TP {} of {} does not allow ODU4 termination creation",
+                                tp.getTpId().getValue(), node.getNodeId().getValue());
+                            continue;
+                        }
+                        break;
+
+                    case StringConstants.SERVICE_TYPE_10GE:
+                        if (!checkOdtuTTPforLoOduCreation(ontTp1, 10)) {
+                            LOG.error("TP {} of {} does not allow OD2e termination creation",
+                                tp.getTpId().getValue(), node.getNodeId().getValue());
+                            continue;
+                        }
+                        break;
+                    case StringConstants.SERVICE_TYPE_100GE_M:
+                        if (!checkOdtuTTPforLoOduCreation(ontTp1, 20)) {
+                            LOG.error("TP {} of {} does not allow ODU4 termination creation",
+                                tp.getTpId().getValue(), node.getNodeId().getValue());
+                            continue;
+                        }
+                        break;
+                    case StringConstants.SERVICE_TYPE_1GE:
+                        if (!checkOdtuTTPforLoOduCreation(ontTp1, 1)) {
+                            LOG.error("TP {} of {} does not allow ODU0 termination creation",
+                                tp.getTpId().getValue(), node.getNodeId().getValue());
+                            continue;
+                        }
+                        break;
+
+                    default:
+                        LOG.error("TP {} of {} does not allow any termination creation",
+                            tp.getTpId().getValue(), node.getNodeId().getValue());
+                        continue;
                 }
+                LOG.info("TP {} of XPONDER {} is validated", tp.getTpId(), node.getNodeId().getValue());
+                this.availableXpdrNWTps.add(tp.getTpId());
             } else if (OpenroadmTpType.XPONDERCLIENT.equals(ocnTp1.getTpType())
-                && (this.otnServiceType.equals("10GE") || this.otnServiceType.equals("1GE"))) {
+                && (StringConstants.SERVICE_TYPE_10GE.equals(this.otnServiceType)
+                    || StringConstants.SERVICE_TYPE_100GE_M.equals(this.otnServiceType)
+                    || StringConstants.SERVICE_TYPE_100GE_S.equals(this.otnServiceType)
+                    || StringConstants.SERVICE_TYPE_1GE.equals(this.otnServiceType))) {
                 TerminationPoint1 ontTp1;
                 if (tp.augmentation(TerminationPoint1.class) != null) {
                     ontTp1 = tp.augmentation(TerminationPoint1.class);
@@ -170,11 +197,19 @@ public class PceOtnNode implements PceNode {
             }
         }
 
-        if ((this.otnServiceType.equals("ODU4") && mode.equals("AZ"))
-            || ((this.otnServiceType.equals("10GE") || this.otnServiceType.equals("1GE"))
+        if ((StringConstants.SERVICE_TYPE_ODU4.equals(this.otnServiceType)
+                || StringConstants.SERVICE_TYPE_ODUC4.equals(this.otnServiceType))
+            || ((StringConstants.SERVICE_TYPE_10GE.equals(this.otnServiceType)
+                    || StringConstants.SERVICE_TYPE_100GE_M.equals(this.otnServiceType)
+                    || StringConstants.SERVICE_TYPE_1GE.equals(this.otnServiceType))
                 && ((mode.equals("AZ") && checkSwPool(availableXpdrClientTps, availableXpdrNWTps, 1, 1))
                      || (mode.equals("intermediate") && checkSwPool(null, availableXpdrNWTps, 0, 2)))
-               )) {
+               )
+            || (StringConstants.SERVICE_TYPE_100GE_S.equals(this.otnServiceType)
+                && (mode.equals("AZ") && checkSwPool(availableXpdrClientTps, availableXpdrNWTps, 1, 1)))
+            || (StringConstants.SERVICE_TYPE_100GE_S.equals(this.otnServiceType)
+                && (mode.equals("intermediate") && checkSwPool(availableXpdrClientTps, availableXpdrNWTps, 0, 2)))
+            ) {
             this.valid = true;
         } else {
             this.valid = false;
@@ -204,7 +239,7 @@ public class PceOtnNode implements PceNode {
             }
 
         }
-        if (clientTps == null && netwTps != null && nbClient == 0 && nbNetw == 2) {
+        if (netwTps != null && nbClient == 0 && nbNetw == 2) {
             netwTps.sort(Comparator.comparing(TpId::getValue));
             @Nullable
             List<NonBlockingList> nblList = new ArrayList<>(node.augmentation(Node1.class).getSwitchingPools()
@@ -226,9 +261,10 @@ public class PceOtnNode implements PceNode {
     private boolean checkTpForOdtuTermination(TerminationPoint1 ontTp1) {
         for (SupportedInterfaceCapability sic : ontTp1.getTpSupportedInterfaces().getSupportedInterfaceCapability()
                 .values()) {
-            LOG.debug("in checkTpForOduTermination - sic = {}", sic.getIfCapType());
-            if (sic.getIfCapType().equals(IfOCHOTU4ODU4.class)
-                && ontTp1.getXpdrTpPortConnectionAttributes().getTsPool() == null) {
+            LOG.info("in checkTpForOduTermination - sic = {}", sic.getIfCapType());
+            if ((sic.getIfCapType().equals(IfOCHOTU4ODU4.class) || sic.getIfCapType().equals(IfOtsiOtsigroup.class))
+                && (ontTp1.getXpdrTpPortConnectionAttributes() == null
+                    || ontTp1.getXpdrTpPortConnectionAttributes().getTsPool() == null)) {
                 return true;
             }
         }
@@ -236,18 +272,19 @@ public class PceOtnNode implements PceNode {
     }
 
     private boolean checkOdtuTTPforLoOduCreation(TerminationPoint1 ontTp1, int tsNb) {
-        if (ontTp1.getXpdrTpPortConnectionAttributes() != null
+        return (ontTp1.getXpdrTpPortConnectionAttributes() != null
             && ontTp1.getXpdrTpPortConnectionAttributes().getTsPool() != null
             && ontTp1.getXpdrTpPortConnectionAttributes().getOdtuTpnPool() != null
-            && ontTp1.getXpdrTpPortConnectionAttributes().getOdtuTpnPool().values()
+            && (ontTp1.getXpdrTpPortConnectionAttributes().getOdtuTpnPool().values()
                 .stream().findFirst().get().getOdtuType()
                 .equals(ODTU4TsAllocated.class)
+                ||
+                ontTp1.getXpdrTpPortConnectionAttributes().getOdtuTpnPool().values()
+                .stream().findFirst().get().getOdtuType()
+                .equals(ODTUCnTs.class))
             && !ontTp1.getXpdrTpPortConnectionAttributes().getOdtuTpnPool().values()
                 .stream().findFirst().get().getTpnPool().isEmpty()
-            && (ontTp1.getXpdrTpPortConnectionAttributes().getTsPool().size() >= tsNb)) {
-            return true;
-        }
-        return false;
+            && (ontTp1.getXpdrTpPortConnectionAttributes().getTsPool().size() >= tsNb));
     }
 
     private boolean checkClientTp(TerminationPoint1 ontTp1) {
@@ -255,18 +292,20 @@ public class PceOtnNode implements PceNode {
                 .values()) {
             LOG.debug("in checkTpForOduTermination - sic = {}", sic.getIfCapType());
             switch (otnServiceType) {
-                case "1GE":
+                case StringConstants.SERVICE_TYPE_1GE:
                 // we could also check the administrative status of the tp
                     if (sic.getIfCapType().equals(If1GEODU0.class)) {
                         return true;
                     }
                     break;
-                case "10GE":
+                case StringConstants.SERVICE_TYPE_10GE:
                     if (sic.getIfCapType().equals(If10GEODU2e.class)) {
                         return true;
                     }
                     break;
-                case "100GE":
+                case StringConstants.SERVICE_TYPE_100GE_T:
+                case StringConstants.SERVICE_TYPE_100GE_M:
+                case StringConstants.SERVICE_TYPE_100GE_S:
                     if (sic.getIfCapType().equals(If100GEODU4.class)) {
                         return true;
                     }
@@ -282,11 +321,10 @@ public class PceOtnNode implements PceNode {
         if (!isValid()) {
             return;
         }
-        if (OpenroadmNodeType.SWITCH.equals(this.nodeType)) {
-            initXndrTps("intermediate");
-        }
         if (this.nodeId.getValue().equals(anodeId) || (this.nodeId.getValue().equals(znodeId))) {
             initXndrTps("AZ");
+        } else if (OpenroadmNodeType.SWITCH.equals(this.nodeType)) {
+            initXndrTps("intermediate");
         } else {
             LOG.info("validateAZxponder: XPONDER is ignored == {}", nodeId.getValue());
             valid = false;
@@ -302,9 +340,9 @@ public class PceOtnNode implements PceNode {
         if (this.nodeType != OpenroadmNodeType.TPDR) {
             return true;
         }
-        org.opendaylight.yang.gen.v1.http.org.openroadm.otn.network.topology.rev181130.Node1 node1 =
+        org.opendaylight.yang.gen.v1.http.org.openroadm.otn.network.topology.rev200529.Node1 node1 =
             node.augmentation(
-                    org.opendaylight.yang.gen.v1.http.org.openroadm.otn.network.topology.rev181130.Node1.class);
+                    org.opendaylight.yang.gen.v1.http.org.openroadm.otn.network.topology.rev200529.Node1.class);
         SwitchingPools sp = node1.getSwitchingPools();
         List<OduSwitchingPools> osp = new ArrayList<>(sp.nonnullOduSwitchingPools().values());
         for (OduSwitchingPools ospx : osp) {
@@ -347,14 +385,17 @@ public class PceOtnNode implements PceNode {
             .getTerminationPoint().values().stream()
             .filter(type -> type
                 .augmentation(
-                    org.opendaylight.yang.gen.v1.http.org.openroadm.common.network.rev181130.TerminationPoint1.class)
+                    org.opendaylight.yang.gen.v1.http.org.openroadm.common.network.rev200529.TerminationPoint1.class)
                 .getTpType().equals(OpenroadmTpType.XPONDERNETWORK))
             .collect(Collectors.toList());
 
         for (TerminationPoint tp : networkTpList) {
-            if (tp.augmentation(TerminationPoint1.class).getXpdrTpPortConnectionAttributes().getOdtuTpnPool() != null
-                && tp.augmentation(TerminationPoint1.class).getXpdrTpPortConnectionAttributes().getOdtuTpnPool()
-                    .values().stream().findFirst().get().getOdtuType().equals(ODTU4TsAllocated.class)) {
+            if (tp.augmentation(TerminationPoint1.class).getXpdrTpPortConnectionAttributes() != null
+                && tp.augmentation(TerminationPoint1.class).getXpdrTpPortConnectionAttributes().getOdtuTpnPool() != null
+                && (tp.augmentation(TerminationPoint1.class).getXpdrTpPortConnectionAttributes().getOdtuTpnPool()
+                    .values().stream().findFirst().get().getOdtuType().equals(ODTU4TsAllocated.class)
+                    || tp.augmentation(TerminationPoint1.class).getXpdrTpPortConnectionAttributes().getOdtuTpnPool()
+                    .values().stream().findFirst().get().getOdtuType().equals(ODTUCnTs.class))) {
                 @Nullable
                 List<Uint16> tpnPool = tp.augmentation(TerminationPoint1.class).getXpdrTpPortConnectionAttributes()
                     .getOdtuTpnPool().values().stream().findFirst().get().getTpnPool();
@@ -371,12 +412,13 @@ public class PceOtnNode implements PceNode {
             .getTerminationPoint().values().stream()
             .filter(type -> type
                 .augmentation(
-                    org.opendaylight.yang.gen.v1.http.org.openroadm.common.network.rev181130.TerminationPoint1.class)
+                    org.opendaylight.yang.gen.v1.http.org.openroadm.common.network.rev200529.TerminationPoint1.class)
                 .getTpType().equals(OpenroadmTpType.XPONDERNETWORK))
             .collect(Collectors.toList());
 
         for (TerminationPoint tp : networkTpList) {
-            if (tp.augmentation(TerminationPoint1.class).getXpdrTpPortConnectionAttributes().getTsPool() != null) {
+            if (tp.augmentation(TerminationPoint1.class).getXpdrTpPortConnectionAttributes() != null
+                && tp.augmentation(TerminationPoint1.class).getXpdrTpPortConnectionAttributes().getTsPool() != null) {
                 @Nullable
                 List<Uint16> tsPool = tp.augmentation(TerminationPoint1.class).getXpdrTpPortConnectionAttributes()
                     .getTsPool();
@@ -418,16 +460,15 @@ public class PceOtnNode implements PceNode {
         }
 
         //Todo refactor Strings (mode and otnServiceType ) to enums
-        if ((pceOtnNode.otnServiceType.equals("ODU4") && pceOtnNode.modeType.equals("AZ"))) {
-            return true;
-        }
-
-        if ((pceOtnNode.otnServiceType.equals("10GE") || pceOtnNode.otnServiceType.equals("1GE"))
-                && (isAz(pceOtnNode) || isIntermediate(pceOtnNode))) {
+        if ((pceOtnNode.otnServiceType.equals(StringConstants.SERVICE_TYPE_ODU4)
+                && pceOtnNode.modeType.equals("AZ"))) {
             return true;
         }
 
-        return false;
+        return ((pceOtnNode.otnServiceType.equals(StringConstants.SERVICE_TYPE_10GE)
+                || pceOtnNode.otnServiceType.equals(StringConstants.SERVICE_TYPE_1GE)
+                || pceOtnNode.otnServiceType.equals(StringConstants.SERVICE_TYPE_100GE_S))
+                && (isAz(pceOtnNode) || isIntermediate(pceOtnNode)));
     }
 
     private boolean isIntermediate(PceOtnNode pceOtnNode) {
@@ -456,6 +497,16 @@ public class PceOtnNode implements PceNode {
         return outgoingLinks;
     }
 
+    @Override
+    public AdminStates getAdminStates() {
+        return adminStates;
+    }
+
+    @Override
+    public State getState() {
+        return state;
+    }
+
     @Override
     public String getXpdrClient(String tp) {
         return this.clientPerNwTp.get(tp);
@@ -518,8 +569,40 @@ public class PceOtnNode implements PceNode {
         return false;
     }
 
+    /*
+    * (non-Javadoc)
+    *
+    * @see org.opendaylight.transportpce.pce.networkanalyzer.PceNode#getVersion()
+    */
     @Override
-    public boolean checkWL(long index) {
-        return false;
+    public String getVersion() {
+        // TODO Auto-generated method stub
+        return null;
+    }
+
+    @Override
+    public BitSet getBitSetData() {
+        // TODO Auto-generated method stub
+        return null;
+    }
+
+    /*
+    * (non-Javadoc)
+    *
+    * @see org.opendaylight.transportpce.pce.networkanalyzer.PceNode#getSlotWidthGranularity()
+    */
+    @Override
+    public BigDecimal getSlotWidthGranularity() {
+        return null;
+    }
+
+    /*
+     * (non-Javadoc)
+     *
+     * @see org.opendaylight.transportpce.pce.networkanalyzer.PceNode#getCentralFreqGranularity()
+     */
+    @Override
+    public BigDecimal getCentralFreqGranularity() {
+        return null;
     }
 }